Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 783 615
2) Placement test : grammar for beginners (anonyme) 6 001 593
3) A/AN (webmaster) 5 370 849
4) Auxiliary BE (webmaster) 3 226 997
5) Present continuous (webmaster) 3 002 988
6) Present simple (webmaster) 2 925 304
7) Present simple (webmaster) 2 601 025
8) Present continuous (webmaster) 2 440 646
9) Adjectives (webmaster) 2 095 352
10) A/an (anonyme) 2 018 557
11) Present perfect simple (webmaster) 1 650 269
12) Preterite (webmaster) 1 636 872
13) Vocabulary - Placement test (bridg) 1 620 848
14) Preterite (webmaster) 1 452 702
15) Short placement test (webmaster) 1 444 997
16) To be (bridg) 1 407 983
17) Present perfect (webmaster) 1 351 754
18) What time is it? (webmaster) 1 351 149
19) The alphabet in English (webmaster) 1 322 725
20) Adjectives (anonyme) 1 217 635
21) What time is it? (webmaster) 1 211 661
22) Numbers (webmaster) 1 189 606
23) 'A' ou 'An' (anonyme) 1 177 919
24) Two presents: present continuous, present simple (webmaster) 1 151 520
25) To be (bridg) 1 146 972
26) Comparatives / Superlatives (webmaster) 1 110 154
27) Numbers (webmaster) 1 072 383
28) CAN / MUST (webmaster) 1 059 930
29) THE/ A / AN / nothing (webmaster) 1 036 426
30) Comparatives (webmaster) 1 008 437
31) Family life (bridg) 1 002 213
32) Numbers > 100 (webmaster) 987 565
33) Future (going to/will/present continuous) (anonyme) 966 509
34) Plural (webmaster) 957 088
35) Superlatives (webmaster) 876 463
36) Adjectives (anonyme) 876 022
37) Simple present (bridg) 855 520
38) Spelled words N°1 (bridg) 851 406
39) Placement test beginners: Check your spelling (anonyme) 830 798
40) Introducing oneself (webmaster) 828 008
41) Adverbs of frequency (anonyme) 819 576
42) Family (bridg) 785 889
43) General test-End of high school / Beginning of university (webmaster) 784 035
44) Present simple (anonyme) 783 777
45) Frequency adverbs (webmaster) 778 861
46) Present BE + Ving (bridg) 767 034
47) Passive form (anonyme) 731 328
48) Genitive (webmaster) 724 528
49) Family tree (anonyme) 720 369
50) Preterite: simple or continuous? (webmaster) 718 415
51) Placement test (beginners) (lili73) 702 694
52) Past simple or present perfect (anonyme) 697 434
53) Future (webmaster) 676 780
54) Present perfect simple (bridg) 664 752
55) 2 Preterites (webmaster) 663 893
56) Preterite (webmaster) 622 788
57) List of 200 irregular verbs and audio (bridg) 617 556
58) Modals (webmaster) 613 523
59) Spelled words N°2 (bridg) 610 158
60) Modals (webmaster) 608 210
61) Height (webmaster) 606 992
62) Articles a / an / the (anonyme) 596 783
63) Plural forms (bridg) 578 647
64) Nationalities (webmaster) 575 096
65) Past continuous / Past simple (anonyme) 569 703
66) Irregular plurals (bridg) 554 649
67) Two presents: simple and continuous (webmaster) 550 568
68) Preterite (bridg) 550 104
69) Superlatives (frapedur) 542 192
70) Vocabulary: greeting people (here4u) 536 583
71) Give your opinion (bridg) 532 899
72) Adverbs of Frequency (bridg) 517 786
73) Present simple or continuous (anonyme) 513 474
74) Present perfect / preterite ? (anonyme) 512 559
75) Possessive case (anonyme) 481 418
76) Countries & nationalities (bridg) 474 408
77) Past tenses (bridg) 472 245
78) 'The' or nothing? (webmaster) 471 833
79) Introducing oneself (easy) (webmaster) 471 295
80) Passive voice (webmaster) 464 999
81) Present Simple vs. Past Simple (anonyme) 460 251
82) Questions : how to ask them (anonyme) 449 169
83) General Test II / End of high school / Beginning of universi (webmaster) 446 842
84) IN, ON, AT or TO? (webmaster) 446 380
85) Relative pronouns (webmaster) 446 100
86) Comparative of superiority (anonyme) 440 694
87) How to pronounce the final -ED? (past simple) (webmaster) 439 562
88) Relative clauses (webmaster) 424 225
89) Sounds: [h] (webmaster) 419 992
90) Comparative (anonyme) 415 354
91) Past simple (anonyme) 400 454
92) A/an/Ø (bridg) 399 763
93) Future simple (anonyme) 397 699
94) This / That / These / Those (webmaster) 393 176
95) Conditional (webmaster) 392 699
96) Passive voice (anonyme) 391 861
97) Comparing (webmaster) 388 563
98) Can / could/ may/ might (woodyrun) 380 667
99) Present perfect or past tense (anonyme) 379 238
100) Much, many, little and few (felin) 374 735
101) Personal pronouns (anonyme) 371 680
102) Preterite continuous (BE + -ING) (webmaster) 371 043
103) Genitive case (bridg) 368 997
104) Some, any, no, enough, too/too much/too many (webmaster) 368 677
105) Confusing words - Placement test (bridg) 364 954
106) Irregular verbs (webmaster) 364 498
107) Numbers from 1 to 10 (anonyme) 362 032
108) Past perfect simple, past perfect continuous (anonyme) 361 220
109) Present continuous or present simple (webmaster) 360 082
110) Present perfect or preterite? (anonyme) 358 849
111) Simple Past : regular verbs (anonyme) 354 774
112) Comparative Adjectives (bridg) 352 731
113) Who, Whom, Which, or Whose? (anonyme) 349 773
114) Past simple (video) (anonyme) 349 433
115) Past simple or past continuous (anonyme) 345 521
116) While / When (anonyme) 340 758
117) What time is it? (webmaster) 338 587
118) Modals (tinou) 337 189
119) Modal: may/might (anonyme) 334 693
120) Cardinal and ordinal numbers (anonyme) 329 247
121) The superlative (anonyme) 327 659
122) Possessive adjectives and pronouns (woodyrun) 324 986
123) How to talk about the weather (lili73) 320 961
124) Since and for (anonyme) 319 719
125) Flags (webmaster) 318 070
126) Irregular verbs (bridg) 316 649
127) Pronouns (woodyrun) 315 389
128) Prepositions - in, on, at (anonyme) 314 550
129) Tenses (anonyme) 312 924
130) Placement test 3 (webmaster) 310 921
131) Order of adjectives (webmaster) 307 044
132) Could/Couldn't (laure95) 306 674
133) Comparative (anonyme) 305 319
134) Adjectives and prepositions (anonyme) 304 530
135) Agreement Tags (webmaster) 304 487
136) Asking questions (webmaster) 303 643
137) Present perfect OR simple past? (bridg) 298 818
138) Questions in the past tense (anonyme) 298 438
139) Uncountable nouns (webmaster) 296 489
140) Superlative Adjectives (bridg) 296 368
141) Object pronouns (bridg) 296 216
142) Passive form (anonyme) 293 864
143) Placement test 1 (anonyme) 293 342
144) Present simple (anonyme) 292 168
145) Can/Must/Should (laure95) 291 176
146) Past perfect (lili73) 290 427
147) Prefer/rather (bridg) 290 061
148) Must or Have to? (woodyrun) 288 401
149) The/an/nothing (bridg) 285 797
150) To be (anonyme) 283 649
151) Can and can't (laure95) 282 958
152) Vocabulary: asking and answering (here4u) 280 495
153) Modal verbs (bridg) 277 659
154) Some / Any / no... (bridg) 275 107
155) Days of the week (bridg) 269 204
156) So / neither (anonyme) 264 605
157) Past simple (video) (anonyme) 264 124
158) Present continuous (chnawa) 261 952
159) Used to (bridg) 260 597
160) Should / must (anonyme) 260 287
161) Past tense (anonyme) 259 722
162) Vocabulary: on the phone (here4u) 258 819
163) Find out a quantity (webmaster) 258 765
164) Articles : a / an / the / Ø (anonyme) 258 422
165) Superlative + and adjective (anonyme) 257 814
166) Comparative and superlative (anonyme) 257 205
167) Numbers 1/100 (anonyme) 253 950
168) Modal can (video) (anonyme) 253 396
169) Comparatives (anonyme) 251 143
170) Relatives pronouns (who, which, that...) (anonyme) 247 892
171) A few, a little, few, little (anonyme) 246 343
172) Vocabulary: at the restaurant (here4u) 245 709
173) Would rather / would prefer to (anonyme) 244 808
174) Present continuous and the Going to form (anonyme) 243 240
175) Should/ have to/ must (anonyme) 241 031
176) Have something done (anonyme) 240 128
177) Used to/would (woodyrun) 238 267
178) The past (webmaster) 238 030
179) Future continuous and future perfect. (felin) 238 000
180) How to ask a question in English (bridg) 236 094
181) Pluperfect (webmaster) 234 459
182) I wish, if only (felin) 234 345
183) Some / any (younes91) 234 025
184) Countable or Uncountable? (webmaster) 233 813
185) Should / shouldn't (anonyme) 232 005
186) Present simple or continuous (bridg) 230 834
187) Adjectives - ing and ed (felin) 229 483
188) Hypothesis (webmaster) 228 662
189) Must or mustn't (laure95) 226 846
190) Auxiliary BE (anonyme) 226 618
191) Articles a/an/the/0 (bridg) 226 470
192) Article The or nothing (anonyme) 226 283
193) Present perfect with Ever - never - (anonyme) 226 152
194) Present continuous OR Present simple? (bridg) 225 715
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 223 143
196) To / in order to / so as to / so that (irish21) 221 114
197) Comparison (komiks) 221 099
198) Present perfect (bridg) 219 804
199) What time is it ? (anonyme) 217 912
200) Indirect speech (bridg) 217 886
