Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 785 578
2) Placement test : grammar for beginners (lucile83) 6 005 104
3) A/AN (webmaster) 5 373 212
4) Auxiliary BE (webmaster) 3 228 154
5) Present continuous (webmaster) 3 004 492
6) Present simple (webmaster) 2 929 459
7) Present simple (webmaster) 2 602 289
8) Present continuous (webmaster) 2 442 988
9) Adjectives (webmaster) 2 096 042
10) A/an (anonyme) 2 019 982
11) Present perfect simple (webmaster) 1 652 701
12) Preterite (webmaster) 1 639 413
13) Vocabulary - Placement test (bridg) 1 621 476
14) Preterite (webmaster) 1 454 561
15) Short placement test (webmaster) 1 445 565
16) To be (bridg) 1 408 798
17) Present perfect (webmaster) 1 353 705
18) What time is it? (webmaster) 1 351 771
19) The alphabet in English (webmaster) 1 323 469
20) Adjectives (lucile83) 1 218 381
21) What time is it? (webmaster) 1 212 547
22) Numbers (webmaster) 1 189 980
23) 'A' ou 'An' (anonyme) 1 178 918
24) Two presents: present continuous, present simple (webmaster) 1 152 472
25) To be (bridg) 1 147 640
26) Comparatives / Superlatives (webmaster) 1 112 446
27) Numbers (webmaster) 1 072 965
28) CAN / MUST (webmaster) 1 060 381
29) THE/ A / AN / nothing (webmaster) 1 037 323
30) Comparatives (webmaster) 1 008 834
31) Family life (bridg) 1 002 829
32) Numbers > 100 (webmaster) 987 964
33) Future (going to/will/present continuous) (anonyme) 967 391
34) Plural (webmaster) 957 655
35) Superlatives (webmaster) 877 078
36) Adjectives (anonyme) 876 561
37) Simple present (bridg) 856 028
38) Spelled words N°1 (bridg) 851 992
39) Placement test beginners: Check your spelling (lucile83) 831 151
40) Introducing oneself (webmaster) 828 389
41) Adverbs of frequency (lucile83) 820 226
42) Family (bridg) 786 379
43) Present simple (lucile83) 784 712
44) General test-End of high school / Beginning of university (webmaster) 784 550
45) Frequency adverbs (webmaster) 779 279
46) Present BE + Ving (bridg) 767 643
47) Passive form (lucile83) 734 645
48) Genitive (webmaster) 724 830
49) Family tree (anonyme) 720 779
50) Preterite: simple or continuous? (webmaster) 719 171
51) Placement test (beginners) (lili73) 703 359
52) Past simple or present perfect (lucile83) 698 567
53) Future (webmaster) 677 049
54) Present perfect simple (bridg) 666 313
55) 2 Preterites (webmaster) 664 500
56) Preterite (webmaster) 623 413
57) List of 200 irregular verbs and audio (bridg) 618 045
58) Modals (webmaster) 613 811
59) Spelled words N°2 (bridg) 610 594
60) Modals (webmaster) 609 418
61) Height (webmaster) 607 259
62) Articles a / an / the (lucile83) 596 826
63) Plural forms (bridg) 579 140
64) Nationalities (webmaster) 575 478
65) Past continuous / Past simple (anonyme) 570 917
66) Irregular plurals (bridg) 555 133
67) Two presents: simple and continuous (webmaster) 550 859
68) Preterite (bridg) 550 563
69) Superlatives (frapedur) 543 492
70) Vocabulary: greeting people (here4u) 536 622
71) Give your opinion (bridg) 533 270
72) Adverbs of Frequency (bridg) 518 097
73) Present simple or continuous (lucile83) 514 252
74) Present perfect / preterite ? (anonyme) 513 689
75) Possessive case (anonyme) 481 746
76) Countries & nationalities (bridg) 474 770
77) Past tenses (bridg) 472 684
78) 'The' or nothing? (webmaster) 472 078
79) Introducing oneself (easy) (webmaster) 471 567
80) Passive voice (webmaster) 465 534
81) Present Simple vs. Past Simple (anonyme) 461 436
82) Questions : how to ask them (lucile83) 449 415
83) General Test II / End of high school / Beginning of universi (webmaster) 447 236
84) IN, ON, AT or TO? (webmaster) 446 836
85) Relative pronouns (webmaster) 446 700
86) Comparative of superiority (lucile83) 441 264
87) How to pronounce the final -ED? (past simple) (webmaster) 440 059
88) Relative clauses (webmaster) 424 480
89) Sounds: [h] (webmaster) 420 208
90) Comparative (anonyme) 415 820
91) Past simple (anonyme) 401 946
92) A/an/Ø (bridg) 400 078
93) Future simple (lucile83) 398 276
94) This / That / These / Those (webmaster) 393 399
95) Conditional (webmaster) 393 154
96) Passive voice (anonyme) 392 301
97) Comparing (webmaster) 388 791
98) Can / could/ may/ might (woodyrun) 381 173
99) Present perfect or past tense (anonyme) 379 803
100) Much, many, little and few (felin) 375 489
101) Personal pronouns (anonyme) 371 777
102) Preterite continuous (BE + -ING) (webmaster) 371 645
103) Genitive case (bridg) 369 295
104) Some, any, no, enough, too/too much/too many (webmaster) 368 886
105) Confusing words - Placement test (bridg) 365 071
106) Irregular verbs (webmaster) 364 827
107) Numbers from 1 to 10 (lucile83) 362 230
108) Past perfect simple, past perfect continuous (anonyme) 361 348
109) Present continuous or present simple (webmaster) 360 278
110) Present perfect or preterite? (anonyme) 359 573
111) Simple Past : regular verbs (anonyme) 355 478
112) Comparative Adjectives (bridg) 352 890
113) Who, Whom, Which, or Whose? (anonyme) 350 219
114) Past simple (video) (lucile83) 349 920
115) Past simple or past continuous (lucile83) 346 475
116) While / When (anonyme) 341 432
117) What time is it? (webmaster) 338 888
118) Modals (tinou) 337 394
119) Modal: may/might (lucile83) 334 907
120) Cardinal and ordinal numbers (anonyme) 329 489
121) The superlative (anonyme) 328 287
122) Possessive adjectives and pronouns (woodyrun) 325 195
123) How to talk about the weather (lili73) 320 999
124) Since and for (lucile83) 320 215
125) Flags (webmaster) 318 280
126) Irregular verbs (bridg) 316 925
127) Pronouns (woodyrun) 315 809
128) Prepositions - in, on, at (anonyme) 314 695
129) Tenses (anonyme) 313 282
130) Placement test 3 (webmaster) 311 077
131) Order of adjectives (webmaster) 307 263
132) Could/Couldn't (laure95) 306 972
133) Comparative (anonyme) 305 509
134) Agreement Tags (webmaster) 304 660
135) Adjectives and prepositions (lucile83) 304 644
136) Asking questions (webmaster) 303 835
137) Present perfect OR simple past? (bridg) 298 967
138) Questions in the past tense (lucile83) 298 799
139) Uncountable nouns (webmaster) 296 724
140) Superlative Adjectives (bridg) 296 668
141) Object pronouns (bridg) 296 583
142) Passive form (anonyme) 294 979
143) Placement test 1 (lucile83) 293 588
144) Present simple (lucile83) 292 510
145) Can/Must/Should (laure95) 292 024
146) Past perfect (lili73) 291 585
147) Prefer/rather (bridg) 290 335
148) Must or Have to? (woodyrun) 288 891
149) The/an/nothing (bridg) 286 007
150) To be (anonyme) 283 691
151) Can and can't (laure95) 283 512
152) Vocabulary: asking and answering (here4u) 280 507
153) Modal verbs (bridg) 277 806
154) Some / Any / no... (bridg) 275 446
155) Days of the week (bridg) 269 231
156) So / neither (anonyme) 264 686
157) Past simple (video) (lucile83) 264 319
158) Present continuous (chnawa) 262 757
159) Should / must (anonyme) 260 683
160) Used to (bridg) 260 666
161) Past tense (anonyme) 259 897
162) Articles : a / an / the / Ø (anonyme) 259 161
163) Vocabulary: on the phone (here4u) 258 866
164) Find out a quantity (webmaster) 258 836
165) Superlative + and adjective (lucile83) 258 088
166) Comparative and superlative (anonyme) 257 915
167) Numbers 1/100 (anonyme) 254 125
168) Modal can (video) (lucile83) 253 508
169) Comparatives (anonyme) 252 093
170) Relatives pronouns (who, which, that...) (anonyme) 247 921
171) A few, a little, few, little (anonyme) 246 625
172) Vocabulary: at the restaurant (here4u) 245 724
173) Would rather / would prefer to (anonyme) 245 055
174) Present continuous and the Going to form (anonyme) 243 459
175) Should/ have to/ must (anonyme) 241 485
176) Have something done (anonyme) 240 204
177) Used to/would (woodyrun) 238 620
178) The past (webmaster) 238 100
179) Future continuous and future perfect. (felin) 238 097
180) How to ask a question in English (bridg) 236 393
181) Pluperfect (webmaster) 234 678
182) Some / any (younes91) 234 502
183) I wish, if only (felin) 234 496
184) Countable or Uncountable? (webmaster) 234 033
185) Should / shouldn't (anonyme) 232 231
186) Present simple or continuous (bridg) 230 840
187) Adjectives - ing and ed (felin) 229 903
188) Hypothesis (webmaster) 228 816
189) Must or mustn't (laure95) 227 361
190) Auxiliary BE (lucile83) 226 775
191) Articles a/an/the/0 (bridg) 226 511
192) Article The or nothing (anonyme) 226 391
193) Present perfect with Ever - never - (anonyme) 226 378
194) Present continuous OR Present simple? (bridg) 225 863
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 223 231
196) Comparison (komiks) 221 928
197) To / in order to / so as to / so that (irish21) 221 421
198) Present perfect (bridg) 219 892
199) Indirect speech (bridg) 218 391
200) What time is it ? (anonyme) 218 004
