Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 785 573
2) Placement test : grammar for beginners (lucile83) 6 005 089
3) A/AN (webmaster) 5 373 202
4) Auxiliary BE (webmaster) 3 228 152
5) Present continuous (webmaster) 3 004 487
6) Present simple (webmaster) 2 929 443
7) Present simple (webmaster) 2 602 279
8) Present continuous (webmaster) 2 442 978
9) Adjectives (webmaster) 2 096 036
10) A/an (anonyme) 2 019 974
11) Present perfect simple (webmaster) 1 652 692
12) Preterite (webmaster) 1 639 399
13) Vocabulary - Placement test (bridg) 1 621 476
14) Preterite (webmaster) 1 454 556
15) Short placement test (webmaster) 1 445 560
16) To be (bridg) 1 408 796
17) Present perfect (webmaster) 1 353 699
18) What time is it? (webmaster) 1 351 769
19) The alphabet in English (webmaster) 1 323 463
20) Adjectives (lucile83) 1 218 379
21) What time is it? (webmaster) 1 212 540
22) Numbers (webmaster) 1 189 978
23) 'A' ou 'An' (anonyme) 1 178 912
24) Two presents: present continuous, present simple (webmaster) 1 152 465
25) To be (bridg) 1 147 640
26) Comparatives / Superlatives (webmaster) 1 112 435
27) Numbers (webmaster) 1 072 964
28) CAN / MUST (webmaster) 1 060 378
29) THE/ A / AN / nothing (webmaster) 1 037 320
30) Comparatives (webmaster) 1 008 834
31) Family life (bridg) 1 002 827
32) Numbers > 100 (webmaster) 987 963
33) Future (going to/will/present continuous) (anonyme) 967 385
34) Plural (webmaster) 957 647
35) Superlatives (webmaster) 877 077
36) Adjectives (anonyme) 876 559
37) Simple present (bridg) 856 026
38) Spelled words N°1 (bridg) 851 992
39) Placement test beginners: Check your spelling (lucile83) 831 150
40) Introducing oneself (webmaster) 828 389
41) Adverbs of frequency (lucile83) 820 224
42) Family (bridg) 786 378
43) Present simple (lucile83) 784 710
44) General test-End of high school / Beginning of university (webmaster) 784 510
45) Frequency adverbs (webmaster) 779 276
46) Present BE + Ving (bridg) 767 639
47) Passive form (lucile83) 734 635
48) Genitive (webmaster) 724 829
49) Family tree (anonyme) 720 778
50) Preterite: simple or continuous? (webmaster) 719 167
51) Placement test (beginners) (lili73) 703 357
52) Past simple or present perfect (lucile83) 698 558
53) Future (webmaster) 677 049
54) Present perfect simple (bridg) 666 306
55) 2 Preterites (webmaster) 664 499
56) Preterite (webmaster) 623 413
57) List of 200 irregular verbs and audio (bridg) 618 044
58) Modals (webmaster) 613 810
59) Spelled words N°2 (bridg) 610 594
60) Modals (webmaster) 609 410
61) Height (webmaster) 607 258
62) Articles a / an / the (lucile83) 596 826
63) Plural forms (bridg) 579 132
64) Nationalities (webmaster) 575 472
65) Past continuous / Past simple (anonyme) 570 912
66) Irregular plurals (bridg) 555 127
67) Two presents: simple and continuous (webmaster) 550 855
68) Preterite (bridg) 550 559
69) Superlatives (frapedur) 543 483
70) Vocabulary: greeting people (here4u) 536 620
71) Give your opinion (bridg) 533 270
72) Adverbs of Frequency (bridg) 518 096
73) Present simple or continuous (lucile83) 514 249
74) Present perfect / preterite ? (anonyme) 513 686
75) Possessive case (anonyme) 481 744
76) Countries & nationalities (bridg) 474 764
77) Past tenses (bridg) 472 683
78) 'The' or nothing? (webmaster) 472 078
79) Introducing oneself (easy) (webmaster) 471 567
80) Passive voice (webmaster) 465 530
81) Present Simple vs. Past Simple (anonyme) 461 418
82) Questions : how to ask them (lucile83) 449 415
83) General Test II / End of high school / Beginning of universi (webmaster) 447 194
84) IN, ON, AT or TO? (webmaster) 446 835
85) Relative pronouns (webmaster) 446 700
86) Comparative of superiority (lucile83) 441 261
87) How to pronounce the final -ED? (past simple) (webmaster) 440 050
88) Relative clauses (webmaster) 424 480
89) Sounds: [h] (webmaster) 420 206
90) Comparative (anonyme) 415 818
91) Past simple (anonyme) 401 938
92) A/an/Ø (bridg) 400 078
93) Future simple (lucile83) 398 273
94) This / That / These / Those (webmaster) 393 398
95) Conditional (webmaster) 393 152
96) Passive voice (anonyme) 392 297
97) Comparing (webmaster) 388 791
98) Can / could/ may/ might (woodyrun) 381 172
99) Present perfect or past tense (anonyme) 379 800
100) Much, many, little and few (felin) 375 486
101) Personal pronouns (anonyme) 371 777
102) Preterite continuous (BE + -ING) (webmaster) 371 638
103) Genitive case (bridg) 369 294
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) 359 571
111) Simple Past : regular verbs (anonyme) 355 478
112) Comparative Adjectives (bridg) 352 890
113) Who, Whom, Which, or Whose? (anonyme) 350 217
114) Past simple (video) (lucile83) 349 919
115) Past simple or past continuous (lucile83) 346 472
116) While / When (anonyme) 341 426
117) What time is it? (webmaster) 338 888
118) Modals (tinou) 337 394
119) Modal: may/might (lucile83) 334 906
120) Cardinal and ordinal numbers (anonyme) 329 487
121) The superlative (anonyme) 328 281
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) 318 278
126) Irregular verbs (bridg) 316 923
127) Pronouns (woodyrun) 315 805
128) Prepositions - in, on, at (anonyme) 314 695
129) Tenses (anonyme) 313 282
130) Placement test 3 (webmaster) 311 076
131) Order of adjectives (webmaster) 307 261
132) Could/Couldn't (laure95) 306 972
133) Comparative (anonyme) 305 508
134) Agreement Tags (webmaster) 304 658
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) 298 797
139) Uncountable nouns (webmaster) 296 724
140) Superlative Adjectives (bridg) 296 668
141) Object pronouns (bridg) 296 581
142) Passive form (anonyme) 294 976
143) Placement test 1 (lucile83) 293 588
144) Present simple (lucile83) 292 507
145) Can/Must/Should (laure95) 292 020
146) Past perfect (lili73) 291 575
147) Prefer/rather (bridg) 290 335
148) Must or Have to? (woodyrun) 288 889
149) The/an/nothing (bridg) 286 006
150) To be (anonyme) 283 690
151) Can and can't (laure95) 283 508
152) Vocabulary: asking and answering (here4u) 280 507
153) Modal verbs (bridg) 277 805
154) Some / Any / no... (bridg) 275 446
155) Days of the week (bridg) 269 230
156) So / neither (anonyme) 264 686
157) Past simple (video) (lucile83) 264 316
158) Present continuous (chnawa) 262 752
159) Should / must (anonyme) 260 681
160) Used to (bridg) 260 666
161) Past tense (anonyme) 259 894
162) Articles : a / an / the / Ø (anonyme) 259 160
163) Vocabulary: on the phone (here4u) 258 866
164) Find out a quantity (webmaster) 258 836
165) Superlative + and adjective (lucile83) 258 085
166) Comparative and superlative (anonyme) 257 909
167) Numbers 1/100 (anonyme) 254 125
168) Modal can (video) (lucile83) 253 508
169) Comparatives (anonyme) 252 089
170) Relatives pronouns (who, which, that...) (anonyme) 247 919
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) 241 483
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) 234 501
183) I wish, if only (felin) 234 496
184) Countable or Uncountable? (webmaster) 234 032
185) Should / shouldn't (anonyme) 232 231
186) Present simple or continuous (bridg) 230 840
187) Adjectives - ing and ed (felin) 229 901
188) Hypothesis (webmaster) 228 814
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) 226 390
193) Present perfect with Ever - never - (anonyme) 226 378
194) Present continuous OR Present simple? (bridg) 225 861
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 223 231
196) Comparison (komiks) 221 920
197) To / in order to / so as to / so that (irish21) 221 420
198) Present perfect (bridg) 219 892
199) Indirect speech (bridg) 218 390
200) What time is it ? (anonyme) 218 004
